Plant aggregates and fibers in earth construction materials: A review

Laborel-Préneron, Aurélie; Aubert, Jean‐Emmanuel; Magniont, Camille; Tribout, Christelle; Bertron, Alexandra

doi:10.1016/j.conbuildmat.2016.02.119

Cited by 303 publications

(164 citation statements)

References 68 publications

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“…As porosity generally increases, by comparison dry bulk density decreases. Demonstrated within Figure 4, it is evident that dry bulk density has a moderately inversely proportional relationship (where Pearson Correlation Coefficient (PCC) r = -0.65) with open porosity.This relationship between porosity and dry bulk density and other material characteristics follows other research as explored in(Bouguerra et al, 1998) and(Laborel-Préneron et al, 2016).…”

supporting

confidence: 82%

“…Similar to previous research, Gomes et al (2016) used both air-lime and hydraulic lime with varying weight of earth, increasing binder also increased water absorption coefficient. Further to the addition of earth and stabilisers, the incorporation of fibres to a mix design has been proven to be beneficial in terms of thermal characteristics by reducing thermal conductivity (Laborel-Préneron et al, 2016) and improving compressive strength (Palumbo et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Bio-fibre earth composite mortar: A structural and hygrothermal assessment

Romano¹,

Brás²,

Grammatikos³

et al. 2019

Sustainable Construction Materials and Technologies (SCMT)

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Bio-fibres and earth as a building material have been used for thousands of years and can be utilised due to their relative abundancy around the globe. The aim of this work is to combine these materials in order to give potential for a new, sustainably sourced, non-load bearing hygric buffering panel for indoor thermal management with bio-fibres commercialised in UK. Currently, there is limited knowledge specifically as to how bio-fibres and earth combine in order to enhance their inherent characteristics. This uses two differing mix designs and 3 differing bio-fibres (Wool 1, Wool 2 and Saw Mill Residue). Earth was utilised by using locally sourced material from Liverpool (NW England). Prismatic, 0.1m 2 x 0.1m 2 and 40mm disc samples were cast and samples were exposed to cyclical step changes in relative humidity at 75% for 8 hours and 53% for 16 hours at 23 o C, in order to mimic a UK household occupancy. Results demonstrate that an optimised mix lead to at least 30% improvement of properties if Saw Mill Residue (SMR) is added. In comparison to a plain earth mortar, the addition of SMR reduces density, porosity and increases moisture buffering.

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supporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Bio-fibre earth composite mortar: A structural and hygrothermal assessment

Romano¹,

Brás²,

Grammatikos³

et al. 2019

Sustainable Construction Materials and Technologies (SCMT)

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“…Much research has been done to improve the physical properties of water absorption and capillarity in adobe using several stabilizers: Vilane (2010), Piattoni et al (2011), Millogo et al (2014, Corrêa et al (2015), Aguilar el al. (2016), Dove et al (2016), Hamard et al (2016), Laborel-Préneron et al (2016), Millogo et al (2016), Stazi et al (2016), Eires et al (2017) and Nakamatsu et al (2017).…”

Section: Introductionmentioning

confidence: 99%

Physical, Mechanical and Thermal Behavior of Adobe Stabilized With “Synthetic Termite Saliva”

et al. 2019

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Adobe is an efficient construction material for several reasons, such as its thermal comfort, sustainability, and lower energy cost, as well as the simplicity of its production and execution. However, challenges such as water absorption, capillarity, and compressive strength should be investigated to improve its physical and mechanical properties. "Synthetic termite saliva" (STS) is an excellent stabilizer with high cohesive and hydrophobic power. Therefore, the objective of this work was to evaluate the effects of STS incorporation into adobe, analyzing its physical, mechanical and thermal properties. Five treatments were studied: 0 (control); 0.1; 0.2; 0.4 and 0.8% STS by mass. These adobe samples were evaluated according to bulk density, linear shrinkage, capillarity, water absorption, thermal conductivity and compressive strength, according to Norma Técnica de Edificación (NTE) E0.80 testing using a new methodology. Linear shrinkage decreases from 2.7 to 1.91 cm with 0.4% STS. Capillarity decreases with the increasing amounts of STS. Water absorption decreased from 12.03 to 6.31% using 0.4% STS, and its mass was reduced from 779 to 19 grams. The thermal conductivity showed no differences between concentrations. The compressive strength was reduced but was still acceptable based on NTE E.080. The stabilization of the adobe using STS showed an improvement in its physical properties, mainly due to its hydrophobic power.

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“…In the literature, 80 many studies focus on the influence of plant fibres or aggregates on compressive 81 strength. Twenty-three references investigating compressive strength on this kind 82 of materials are cited in (Laborel-Préneron et al, 2016). Several studies have 83 observed an increase of compressive strength with increasing proportions of 84 plant aggregates such as tea residue (Demir, 2006), sawdust, tobacco residue or 85 grass (Demir, 2008) or cassava peel (Villamizar et al, 2012).…”

Section: Introduction 46mentioning

confidence: 99%

Effect of Plant Aggregates on Mechanical Properties of Earth Bricks

Laborel-Préneron

Aubert

Magniont

et al. 2017

J. Mater. Civ. Eng.

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Effect of plant aggregates on the mechanical properties of earth bricks 25 26 ABSTRACT 27A building material is mainly characterized by its mechanical performance, which 28 provides proof of its quality. However, the measurement of the compressive or 29 flexural strength of an earth-based material with plant aggregates, which is very 30 ductile, is not fully standardised. The objective of this study is to determine the 31 compressive and flexural strengths of a composite made of earth and 0%, 3% or 32 6% of barley straw, hemp shiv or corn cob. Given the manufacturing processes 33 available, cylindrical compressed specimens were studied in compression 34 whereas extruded specimens were studied in flexion. Two protocols were tested 35 for compressive strength measurements: one with direct contact between the 36 specimen and the press, and the other with reduced friction. The test with 37 reduced friction engendered a huge decrease of the stress and a slight decrease 38 of the strain. For both compressive and flexural strengths, the specimens made 39 of earth alone were the most resistant, followed by composites containing straw. 40

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Plant aggregates and fibers in earth construction materials: A review

Cited by 303 publications

References 68 publications

Bio-fibre earth composite mortar: A structural and hygrothermal assessment

Bio-fibre earth composite mortar: A structural and hygrothermal assessment

Physical, Mechanical and Thermal Behavior of Adobe Stabilized With “Synthetic Termite Saliva”

Effect of Plant Aggregates on Mechanical Properties of Earth Bricks

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